A touch-sensitive electronic device has a sensor part to detect a capacitance that varies according to a touch or a proximity of an operation body on or to an operation surface, a memory part to store a reference value used as a basis of calculation of an amount of change in the capacitance and a threshold value used for detection of the touch or the proximity, a determination part configured to compare the amount of change in the capacitance with the threshold value and to determine a state of the touch or the proximity, and a controller configured to suspend touch sensing during a period when the proximity of the operation body is not detected by the determination part, and to suspend proximity sensing operation during a period when the touch of the operation body is detected by the determination part.